• Model NO.：8.5in
• Number of Shaft：3
• Controlling Mode：Artificial
• Structure：Deep Hole Drilling
• Precision：High Precision
• Condition：New
• Wob：0.4-1.0kn,mm
• Rpm：120-50
• Transport Package：Wooden Case
• Specification：ISO
• Trademark：hengji
• Origin：Hebei Hejian
• HS Code：82071990
• Production Capacity：1000PCS,Month

IADCWOBRPMApplicable Formations(KN/MM)(r/min)(Bit Dia)116  1170.35~0.8150~80Very soft formations with low compressive strength and high drillability,such as clay,mudston,chalk etc.126  1270.35~0.9150~70Soft formations with low compressive strength and high drillability,such as mudstore,gypsum,salt,softshale.soft limestone,ect.136  1370.35~1.0120~60Soft to mesium soft formations with low compressive strength and high drillability.such as medium soft shale,hard gypsum,medium soft limestone.medium soft sandstone soft formation with harder nterbeds,ect.216  2170.4~1.0100~60Medium hard formations with high compressive strength,such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft formation with harder interbeds ect.246  2470.4~1.080~50Medium hard formations with high compressive strength,such as abrasive shale.limestone,sandstone,dolomite,hard gypsum,marble,ect.417  4370.35~0.9150~70Very soft formations with low compressive strength and high drillability,such as clay,mudston,chalk,gypsum,salt,soft shale,soft limestone,etc.447517  5270.35~1.0140~60Soft formations with low compressive strength and high drillability,such as mudstore,gypsum,salt,soft shale.soft limestone,ect.537  5470.45~1.0120~50Soft to medium formations with low compressive strength,such as medium soft shale,medium soft limestone,medium soft sandstone,medium formation with harder and abrasiver interbeds,ect.617  6270.45~1.190~50Medium hard formations with high compressive strength,such as hard shale,limestone,sandstone,dolomite,ect.6370.5~1.280~40Hard formations with high compressive strength,such as sandstone,limestone,dolomite,hard gypsum,marble,ect.